Vilsmeier-Haack Reagents. Novel Electrophiles for the One-Step Formylation of<i>O</i>-Silylated Ethers to<i>O</i>-Formates
作者:Jean-Paul Lellouche、Vadim Kotlyar
DOI:10.1055/s-2004-815435
日期:——
Various O-silylated substrates were effectively converted in one-step to their corresponding O-formates using electrophilic racemic and homochiral Vilsmeier-Haack reagents. Reactivity trends of these transformations were examined that, specifically, emphasized their synthetic potential.
Preparation of formate esters from O-TBDMS/O-TES protected alcohols. A one-step conversion using the Vilsmeier-Haack complex
作者:Sylvain Koeller、Jean-Paul Lellouche
DOI:10.1016/s0040-4039(99)01453-7
日期:1999.9
O-tert-Butyldimethylsilylated (O-TBDMS) or O-triethylsilylated (O-TES) alcohols were converted in one step to their corresponding formates under Vilsmeier-Haack conditions (). The scope and limitations of this novel reaction for interconverting alcohol protecting groups are described.
Synthesis and Properties of (<b><i>η</i></b><sup>3</sup>-1-Methylallyl)palladium(II) Formates as Models of Intermediates in the Palladium-Catalyzed Reductive Cleavage of Allylic Carboxylates and Carbonates with Formic Acid
In order to gain insight into the mechanism of the regioselective formation of alkenes in the palladium-catalyzed reductive cleavage of allylic carboxylates or carbonates with formic acid, two types of (η3-1-methylallyl)palladium formates (P1 and P2 types) have been prepared as simple models of catalytic intermediates. The P1 type is a neutral complex coordinated with one tertiary phosphine ligand